Add tenant template for air traffic control example

Description

Add a tenant template that can be used to create the data model / configuration for the air traffic control example. Previously, the example had to use REST services to add the data model before it started generating data via STOMP, and the user had to manually configure the assets and event source settings. Now, the tenant template can be used to provide the entire data model and working configuration, which will make it much easier for people to run the example.